The necessity of circular motion in tonguing a woman to orgasm. (of note: in the northern hemisphere, tonguing must occur in a clockwise motion; south of the equator, tongue motion must be executed counter clockwise to achieve equal effect)
Cheryl did not come through straight intercourse. I always had to subsequently apply the clitoriolis effect to get her there.
A woman who after extensive attention takes forever to orgasm. This is likely caused from improper foreplay, she is being raped, she is dead, or you just don't do it for her.
Shit G, you need to give that girl some foreplay or her clitortoise will never come out its shell.